How to time travel to the past?

Yes,but we cannot do it in the mean time,
Most of the people think that time traveling must be traveled by time machine.
Based on what we have today, we still cannot travel back to the past.
Maybe we may travel back to the past in the future.
I realized many people wish to travel back to the past, because they want to rewrite their history.Unfortunately, we don't have high technology, otherwise we all can travel back to the past, to do something we want & don't want to do.I wish I can travel back to the past too, so I bought a lot of books about time traveling. I suggest you go buy books with the similar topic, it might help you solve your problems.
If you care about your past, why don't you do more better, in order make your life full of happiness.
Here I hope your question will be come true one of the days.

2007-02-01 07:10:13 補充：
I got this idea from my book.

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感謝你。

在現實,的確可以時間旅行.
人們經常想像時間就是一條嚴謹的直綫,有先因有後果,但事實上,從一個非綫性非主觀的觀點來說,時間其實像一個亂7八糟一團混亂的大球,如果你在過去改變了一些已發生了的事,那會令到三分之一的宇宙崩潰,舉個例,有個人從不在過去存在卻在現實生存,想像一下那會怎樣?

Based on present technolgy, time travel is not possible.

One of the strong argument against time travel is that if it were possible, we should expect to meet time travelers coming back from the future to meet us. But there is none.